The control arms have CNC stainless steel cross shafts which incorporate DSE's 'Caster Tuner Bushings'. These aluminum bushings adjust caster by moving the upper control arm fore/aft for more or less caster without adding alignment shims. This unique caster adjustment design is engineered to be precise and permanent. The upper control arms also utilize DSE designed bushings. These greaseable aluminum/Delrin bushings have an increased stiffness over stock. This provides more consistent and precise handling. The bushings also have CNC machined bevel stainless washers and stainless ny-lock nuts. The upper control arms have CNC machined tube ends for precision fits. The arms are then TIG welded in a fixture for accuracy and repeatability of geometry. The ball joint pocket is CNC machined from steel for increased strength. The arms are powder coated gloss black and come assembled with ball joints and include two sets of 'Caster Tuner Bushings'. Arms come assembled and are ready to install right out of the box. Sold in pairs, however some applications are also available as a complete set of four with a drop spindle.